process change

  1. J

    A change in process is proposed. How do I determine if the change will be good without any data?

    I am working on a project where a machine has a part replaced every 500 hours it's been run or it fails (which ever comes first). I have been asked to determine if we should lower the replacement time to 100 hours to make the machine have better reliability. I have a lot of data of failures of...